/*
 * $Id: GolombBuffer.h 1457 2010-01-01 03:13:59Z xhmikosr $
 *
 * (C) 2006-2010 see AUTHORS
 *
 * This file is part of mplayerc.
 *
 * Mplayerc is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Mplayerc is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */


#pragma once


class CGolombBuffer
{
public:
    CGolombBuffer(BYTE* pBuffer, int nSize);

    UINT64			BitRead(int nBits, bool fPeek = false);
    UINT64			UExpGolombRead();
    INT64			SExpGolombRead();
    void			BitByteAlign();

    inline BYTE		ReadByte()
    {
        return (BYTE) BitRead(8);
    };
    inline SHORT	ReadShort()
    {
        return (SHORT)BitRead(16);
    };
    inline DWORD	ReadDword()
    {
        return (DWORD)BitRead(32);
    };
    void			ReadBuffer(BYTE* pDest, int nSize);

    void			Reset();
    void			Reset(BYTE* pNewBuffer, int nNewSize);

    void			SetSize(int nValue)
    {
        m_nSize = nValue;
    };
    int				GetSize()
    {
        return m_nSize;
    };
    int				RemainingSize()
    {
        return m_nSize - m_nBitPos;
    };
    bool			IsEOF()
    {
        return m_nBitPos >= m_nSize;
    };
    INT64			GetPos();
    BYTE*			GetBufferPos()
    {
        return m_pBuffer + m_nBitPos;
    };

    void			SkipBytes(int nCount);

private :
    BYTE*		m_pBuffer;
    int			m_nSize;
    int			m_nBitPos;
    int			m_bitlen;
    INT64		m_bitbuff;
};
